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| 型号： | KSZ8841-16MQL |
| 厂商： | Micrel Inc |
| 文件页数： | 38/105页 |
| 文件大小： | 0K |
| 描述： | IC MAC CTRLR 8/16BIT 128-PQFP |
| 标准包装： | 66 |
| 控制器类型： | 以太网控制器，MAC |
| 接口： | 总线 |
| 电源电压： | 3.1 V ~ 3.5 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 128-BFQFP |
| 供应商设备封装： | 128-PQFP（14x20） |
| 包装： | 托盘 |
| 产品目录页面： | 1080 (CN2011-ZH PDF) |
| 配用： | 576-1631-ND - BOARD EVALUATION KSZ8841-16MQL |
| 其它名称： | 576-2112 KSZ8841-16MQL-ND |
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Micrel, Inc.
KSZ8841-16/32 MQL/MVL/MBL
October 2007
38
M9999-102207-1.6
4.
The asynchronous interface uses RDN and WRN signal strobes for data latching. If necessary, ARDY is de-
asserted on the leading edge of the strobe.
5.
The VLBUS-like synchronous interface uses BCLK, ADSN, and SWR and CYCLEN to control read and write
operations and generate SRDYN to insert the wait state, if necessary, when VLBUSN = 0. For read, the data must
be held until RDYRTNN is asserted.
The EISA-like burst transfer is supported using synchronous interface signals and DATACSN when I/O signal VLBUSN =
1. Both the system/host/memory and KSZ8841M are capable of inserting wait states. To set the system/host/memory to
insert a wait state, assert RDYRTNN signal. To set the KSZ8841M to insert a wait state, assert SRDYN signal.
Queue Management Unit (QMU)
The Queue Management Unit (QMU) manages packet traffic between the MAC/PHY interface and the system host. It has
built-in packet memory for receive and transmit functions called TXQ (Transmit Queue) and RXQ (Receive Queue). Each
queue contains 4KB of memory for back-to-back, non-blocking frame transfer performance. It provides a group of control
registers for system control, frame status registers for current packet transmit/receive status, and interrupts to inform the
host of the real time TX/RX status.
Transmit Queue (TXQ) Frame Format
The frame format for the transmit queue is shown in the following Table 3. The first word contains the control information
for the frame to transmit. The second word is used to specify the total number of bytes of the frame. The packet data
follows. The packet data area holds the frame itself. It may or may not include the CRC checksum depending upon
whether hardware CRC checksum generation is enabled.
Multiple frames can be pipelined in both the transmit queue and receive queue as long as there is enough queue memory,
thus avoiding overrun. For each transmitted frame, the transmit status information for the frame is located in the TXSR
register.
Packet Memory
Address Offset
Bit 15
Bit 0
2
nd Byte
1
st Byte
0
Control Word
2
Byte Count
4 - up
Transmit Packet Data
(maximum size is 1916)
Table 3. Frame Format for Transmit Queue
Since multiple packets can be pipelined into the TX packet memory for transmit, the transmit status reflects the status of
the packet that is currently being transferred on the MAC interface, which may or may not be the last queued packet in the
TX queue.
The transmit control word is the first 16-bit word in the TX packet memory, followed by a 16-bit byte count. It must be word
aligned. Each control word corresponds to one TX packet. Table 4 gives the transmit control word bit fields.
Bit
Description
15
TXIC Transmit Interrupt on Completion
When this bit is set, the KSZ8841M sets the transmit interrupt after the present frame has
been transmitted.
14-6
Reserved.
5-0
TXFID Transmit Frame ID
This field specifies the frame ID that is used to identify the frame and its associated status
information in the transmit status register.
Table 4. Transmit Control Word Bit Fields
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| KSZ8841-16MQL A6 | 功能描述:IC MAC CTRLR 8/16BIT 128-PQFP RoHS:是 类别:集成电路 (IC) >> 接口 - 控制器 系列:- 标准包装:4,900 系列:- 控制器类型:USB 2.0 控制器 接口:串行 电源电压:3 V ~ 3.6 V 电流 - 电源:135mA 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:36-VFQFN 裸露焊盘 供应商设备封装:36-QFN（6x6） 包装:* 其它名称:Q6396337A |
| KSZ8841-16MQL-EVAL | 功能描述:以太网开发工具 KSZ8841-16MQL Evaluation Board RoHS:否 制造商:Micrel 产品:Evaluation Boards 类型:Ethernet Transceivers 工具用于评估:KSZ8873RLL 接口类型:RMII 工作电源电压: |
| KSZ8841-16MVL | 功能描述:以太网 IC Single Ethernet Port + Generic (8, 16-bit) bus interface(Lead Free) RoHS:否 制造商:Micrel 产品:Ethernet Switches 收发器数量:2 数据速率:10 Mb/s, 100 Mb/s 电源电压-最大:1.25 V, 3.45 V 电源电压-最小:1.15 V, 3.15 V 最大工作温度:+ 85 C 封装 / 箱体:QFN-64 封装:Tray |
| KSZ8841-16MVL TR | 功能描述:以太网 IC Single Ethernet Port + Generic (8, 16-bit) bus interface(Lead Free) RoHS:否 制造商:Micrel 产品:Ethernet Switches 收发器数量:2 数据速率:10 Mb/s, 100 Mb/s 电源电压-最大:1.25 V, 3.45 V 电源电压-最小:1.15 V, 3.15 V 最大工作温度:+ 85 C 封装 / 箱体:QFN-64 封装:Tray |
| KSZ8841-16MVL-EVAL | 功能描述:BOARD EVALUATION KSZ8841-16MVL RoHS:是 类别:编程器，开发系统 >> 过时/停产零件编号 系列:- 标准包装:1 系列:- 类型:MCU 适用于相关产品:Freescale MC68HC908LJ/LK（80-QFP ZIF 插口） 所含物品:面板、缆线、软件、数据表和用户手册 其它名称:520-1035 |
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